Note the following limitations for using Flexible Storage Sharing (FSS):

• FSS is only supported on clusters of up to 64 nodes.

• Disk initialization operations should be performed only on nodes with local connectivity to the disk.

• FSS does not support the use of boot disks, opaque disks, and non-VxVM disks for network sharing.

• Hot-relocation is disabled on FSS disk groups.

• The VxVM cloned disks operations are not supported with FSS disk groups.

• FSS does not support non-SCSI3 disks connected to multiple hosts.

• Dynamic LUN Expansion (DLE) is not supported.

• FSS only supports instant data change object (DCO), created using the vxsnap operation or by specifying "logtype=dco dcoversion=20" attributes during volume creation.

• By default creating a mirror between SSD and HDD is not supported through vxassist, as the underlying mediatypes are different. To workaround this issue, you can create a volume with one mediatype, for instance the HDD, which is the default mediatype, and then later add a mirror on the SSD.

  For example:

  # vxassist -g diskgroup make volume size init=none

  # vxassist -g diskgroup mirror volume mediatype:ssd

  # vxvol -g diskgroup init active volume